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Feb. ,1925. 1,527,690

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STEAM INSTALLATION Filed Junk 26 1923 J ,4 z "i Zhvenzw Patented Feb. 24, 1925.

UNITED STATES FRANZ IDSEL, or BRUNN, czEcHosLovaKm.

srnaivr INSTALLATION.

Application filed June as, 1923.

To all whom it may concern: Be it known that I, Ing. substitute of managing director, a citizen of Czechoslovakia, residing at Brunn, Czechoslovakia, Glockengasse 5, have invented certain new and useful Improvements in Steam Installations; and I do hereby declare the following to be a full, clear, and exact description of the invent-ion, such as will enable others skilled in the art to which it a-ppertains to make and use the same.

It is usual to adapt existing steam engines, more particularly steam turbines, to a higher output by raising the steam pressure and also, usually, the steam superheat proportionately. In such cases, the steam boilers in the installation were usually removed and replaced by new boilers, generally equipped with superheaters, in correspondence with the higher steam pressure to be used in the installation. I

The present invention enables the boiler workin at the original low steam pressure to be retained an consequently, effects a considerable economy steam installation can be adapted to the altered conditions of working while still employing the previously-fitted steam boilers. The invention consists in pro-viding, in addition to the low pressure boiler, a second boiler for the generation of the higher steam pressure, and in also providing, between said boilers, a thermal storage vessel or accumulator. The steam spaces of the two boilers are directly connected by piping, and separate piping is also employed for directly connecting the water spaces thereof. Piping is also employed for connecting the boilers with the storage vessel, but the latter is devoid of connection with the piping connecting the steam and water spaces of the boilers; all of the various pipe connections being equipped with valves for enabling the passage of the fluids through the individual pipes to be regulate-d. The steam and water space connections are provided for the purpose of im proving the steam efficiency in the boilers themselves, since the surplus heat generated in the high pressure boiler and not necessary for the operation of the plant may flow in the form of steam, hot water, or both, into the low pressure boiler, due to the large water space which the latter boiler possesses as compared with the high pressure boiler. Consequently, the low pressure boiler can FRANZ Losnn,

in first cost, since the Serial No. 647,894.

deliver greater quantities of steam to the plant during periods of increased steam demand, and can utilize the water heat during periods of increased demand for high pressure steam to feed the high pressure boiler. The thermal storage vessel serves to accumulate the surplus heat delivered to it from either boiler or from both of them, for sub sequent use as needed in either or both boilers. The whole plant has, therefore, a greater flexibility, whereby the heat genera tion and consumption, as well as, and particularly, the fuel consumption, are more economically equalized, and the fuel consumption, moreover, is reduced. Furthermore, large fluctuations in steam consumption are avoided, since the water flowing from the high pressure boiler to the low pressure boiler is vaporized, and the steam is utilized to satisfy temporary requirements by admitting it at a suitable stage of the turbine or other steam engine.

In the accompanying drawings:

Figure 1 is a diagrammatic view of a steam plant according to the invention and embodying both a low pressure and a. high pressure steam generator or boiler, and a thermal storage vessel or accumulator located therebetween; and Fig. 2 is a diagram of a modification embodying three generators and an'accumulator.

Referring to Fig. 1, the steam installation comprises the generator or boiler a, which produces steam at pressure p, and the generator or boiler Z), which produces steam at a higher pressure 9 and a suitable steam engine. The engine or prime mover is preferably in the nature of a turbine, and is here shown as of the multi-stage, multi-casing type and as consisting of a high pressure part 0 and a low pressure part 0. Steam at the higher pressure 79 from the boiler Z) is led through a pipe equipped with a. regulating valve 9 into the high pressure part or stage 0 of the turbine; and the exhaust steam from this part or stage 0 flows into the low pressure part or stage 0, which latter receives additional steam from the low pressure boiler a through a pipe (5 provided with a regulating valve 6. A main exhaust pipe 7L and, for example, two branch exhaust pipes z and a" are connected to the low pressure stage 0.

The steam and water erators or boilers a and get-her, respectively, by

spaces of the gen- 6 are connected topipes in and min which regulating valves Z and n are inserted; and the two boilers are further connected, according to my invention, by means of valve-fitted pipes y and a, with the thermal storage device or accumulator w. This device consists of a suitable vessel or tank, the purpose of which is to store surplus heat in the form of steam, hot water or both, delivered thereto from either boiler or from both of them, and at either the same or diiterent times; such heat being subsequently usable as needed, during periods of greater energy or steam consumption, in either or both boilers. This interchange of heat in both directions between the storage vessel and the high pressure and low pressure boilers is or great importance in equal izing the operation and working of the boilers and the peaks in the plant, in equalizing and reducing the fuel consumption, and in increasing the economy of the whole plant.

The water spaces of the boilers may be connected with the water space of the thermal storage vessel, and rotary or circulating pumps (not shown) can be arranged in the piping between said parts to effect the interchange in a forced manner.

The construction represented in Fig. 2 is similar in the main to that indicated in Fig. 1, excepting that it includes a third boiler or generator I), producing steam at a pressure, p which is considerably higher than the pressure p in boiler Z). Live steam from this boiler b is supplied to the high pressure stage or casing 0 of the turbine by means of piping f equipped with a regulating valve g; and pipes is and m, equipped with valves Z anda', are employed to connect the two high pressure boilers I) and I) together. In all other respects, the construction and arrangement are the same as already described. lt is to be observed, however, that in the constructions illustrated there is a single storage vessel only between the boilers a' and b, and that said vessel is devoid of connection with the connecting piping between the water and steam spaces of said boilers.

I claim:

1. A steam installation, comprising high and low pressure steam generators having steam and water spaces therein, a pipe clirectly connecting the steam spaces of the high and low pressure generators, a separate pipe directly connecting the water spaces of said generators, valves to enable the passage of the fluids through the individual pipes to be regulated, a thermal storage vessel located between said generators but devoid of connection with said pipes, and piping connecting said vessel with said generators and provided with means for regulating the passage of the fluids therethrough.

2. A steam installation, comprising high and low pressure boilers having steam and water spaces therein, a pipe connection between the steam spaces of the two boilers, a pipe connection between the water spaces of said boilers, sel located between said boilers, pipe c011- nections between said vessel and the boilers separate from and additional to the first named pipe connections to enable interchange ot heat between the same in both directions, said first named pipe connections being devoid 0t communication with the storage vessel, and a regulating valve in each pipe connection.

' FRANZ LOSEL.

a single thermal storage ves- 

